There is a seasonality to home buying. Buying seems to slow to a trickle during colder months, but that doesn't mean it is necessarily the best time of the year. You might encounter less inventory to choose from in those months, too. I suppose if you define best time as the best time to negotiate, then colder might be better.
Happy hunting, Coffeemon. Hope you find the home of your dreams.
of Longmont, CO